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Fact Families

Fact Families. Objective Today we will learn to write multiplication and division fact families. Let’s Review. Definitions. Addend - Any number being added. 6 + 5 = 11 Inverse Operation - An opposite operation that undoes another. 5 + 4 = 9 9 - 5 = 4.

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Fact Families

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  1. Fact Families

  2. Objective Today we will learn to write multiplication and division fact families.

  3. Let’s Review Definitions • Addend - Any number being added. • 6 + 5 = 11 • Inverse Operation - An opposite operation that undoes another. • 5 + 4 = 9 9 - 5 = 4

  4. Addition/Subtraction Fact Families are found by: • Starting with a simple addition fact. ( 2 + 5 = 7) • Changing the addends around. • (5 + 2 = 7) • Writing the Inverse operations for both. • (7 - 2 = 5 & 7 - 5 = 2)

  5. What are the 4 members of the Fact Family of 3 + 4 = 7? • 3 + 4 = 7 • 4 + 3 = 7 • 7 - 3 = 4 • 7 - 4 = 3

  6. What are the 4 members of the Fact Family of 8 + 1 = 9? • 8 + 1 = 9 • 1 + 8 = 9 • 9 - 8 = 1 • 9 - 1 = 8

  7. Multiplication Definitions • Factors - The numbers being multiplied. • 4 x 8 = 32 • Inverse Operation - An opposite operation that undoes another. • 4 x 8 = 32 32 ÷ 4 = 8

  8. Multiplication/Division Fact Families are found by: • Starting with a simple multiplication fact. ( 3 x 9 = 27) • Changing the Factors around. • (9 x 3 = 27) • Writing the Inverse operations for both. • (27 ÷ 3 = 9 & 27 ÷ 9 = 3)

  9. What are the 4 members of the Fact Family of 3 x 7 = 21? model • 3 x 7 = 21 • 7 x 3 = 21 • 21 ÷ 3 = 7 • 21 ÷ 7 = 3

  10. What are the 4 members of the Fact Family of 6 x 4 = 24? • 6 x 4 = 24 • 4 x 6 = 24 • 24 ÷ 6 = 4 • 24 ÷ 4 = 6

  11. Multiplication/Division Fact Families are found by: • Starting with a simple multiplication fact. ( 3 x 9 = 27) • Changing the Factors around. • (9 x 3 = 27) • Writing the Inverse operations for both. • (27 ÷ 3 = 9 & 27 ÷ 9 = 3)

  12. What are the 4 members of the Fact Family of 7 x 8 = 56? Guided • 7 x 8 = 56 • 8 x 7 = 56 • 56 ÷ 7 = 8 • 56 ÷ 8 = 7

  13. What are the 4 members of the Fact Family of 9 x 7 = 63? • 9 x 7 = 63 • 7 x 9 = 63 • 63 ÷ 9 = 7 • 63 ÷ 7 = 9

  14. What are the 4 members of the Fact Family of 6 x 7 = 42? • 6 x 7 = 42 • 7 x 6 = 42 • 42 ÷ 6 = 7 • 42 ÷ 7 = 6

  15. Multiplication/Division Fact Families are found by: • Starting with a simple multiplication fact. ( 3 x 9 = 27) • Changing the Factors around. • (9 x 3 = 27) • Writing the Inverse operations for both. • (27 ÷ 3 = 9 & 27 ÷ 9 = 3) CFU

  16. Closure • A fact family will have two multiplication problems and two division problems. • Inverse Operation - An opposite operation that undoes another. • 3x4=12 *** 12 ÷ 4 = 3

  17. Independent Practice • Write a multiplication and division fact family for the following: • 1) 5 x6 = 30 6) 9x8 = 72 • 2) 8x3 = 24 7) 4x8 = 32 • 3) 7x2 = 14 8) 3x9 = 27 4) 6x8 = 48 9) 9x 2 =18 5) 2x4 = 8 10) 4x 6 = 24

  18. Answers • 1) 5 x6 = 30 6x5=30 30 ÷ 6=5 30 ÷ 5=6 • 2) 8x3=24 3x8=24 24 ÷ 8=3 24 ÷ 3=8 • 3) 7x2=24 2x7=14 14 ÷ 2=7 14 ÷ 7=2 • 4) 6x8=48 8x6=48 48 ÷ 6=8 48 ÷ 8=6 • 5) 2x4=8 4x2=8 8 ÷ 4=2 8 ÷ 2=4

  19. 6) 9x8=72 8x9=72 72 ÷ 9=8 72 ÷ 8=0 7) 4x8=32 8x4=32 32 ÷ 8=4 32 ÷ 4=8 8) 3x9=27 9x3=27 27 ÷ 9=3 27 ÷ 3=9 9) 9x2=18 2x9=18 18 ÷ 9=2 18 ÷ 2=9 10) 4x6=24 6x4=24 24 ÷ 6=4 24 ÷ 4=6

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